The Sinclair & Rush Family of Companies includes StockCap, GripWorks & VisiPak. Each of our brands manufacturer products for protection each with their own unique purposes. With four nationwide locations operating multiple manufacturing processes & serving a wide range of industries, the Sinclair & Rush brands have grown and maintain the highest quality of products and services within the plastics industry. From dip molding to extrusion, injection molding and thermoforming, we’ve got it covered.